<?php

// Namespace
namespace Leximo;

// Use
use Exception;

/**
 * Meta
 * @param void
 * @return void
 */

class Meta {

  /* @var string */
  private $object_type = null;

  /* @var int */
  private $object_id = null;

  /* @var array */
  private $meta = null;

  /**
   * Constructor
   * @param string
   * @return object
   */

  public function __construct($object_type, $object_id) {

    // Set meta
    $this->set($object_type, $object_id);

  }

  /**
   * Set
   * @param string, int
   * @return array
   */

  private function set($object_type, $object_id) {

    // Post
    if($object_type == 'post') {
      $meta = get_post_meta($object_id);
    }

    // Term
    else if ($object_type == 'term') {
      $meta = get_term_meta($object_id);
    }

    // Fuck of
    else {
      throw new Exception('Object type must be term or post!');
    }

    // Fill
    foreach($meta as $key=>$value) {
      $this->meta[$key] = isset($value[0]) ? maybe_unserialize($value[0]) : null;
    }

  }

  /**
   * Get by key
   * @param string
   * @return mixed
   */

  private function getByKey($key) {
    return isset($this->meta[$key]) ? $this->meta[$key] : null;
  }

  /**
   * Get by prefix
   * @param string
   * @return mixed
   */

  private function getByPrefix($prefix, $remove_prefix) {

    // Set result
    $meta = [];

    // Fill result
    foreach($this->meta as $key=>$val) {
      if(substr($key, 0, strlen($prefix)) == $prefix) {
        $meta[(($remove_prefix) ? str_replace($prefix, '', $key) : $key)] = $val;
      }
    }

    // Return result
    return $meta;

  }

  /**
   * Get
   * @param string, string
   * @return array
   */

  public function get($key = null, $prefix = false, $remove_prefix = true) {

    // Prefixed
    if($key and $prefix) {
      return $this->getByPrefix($key, $remove_prefix);
    }

    // By key
    else if($key) {
      return $this->getByKey($key);
    }

    // Get all
    return $this->meta;

  }

}